http://rdf.ncbi.nlm.nih.gov/pubchem/patent/SU-1685878-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_71ef7562fc3b067dcc515393df2c473a |
| classificationIPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C02F101-34 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C02F103-28 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C02F103-36 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C02F101-10 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C02F1-58 |
| filingDate | 1988-07-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1991-10-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4f629e454ec7a43c687ec07f5add7134 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ef780558c7c72da771e3125d638c4f58 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0482caf6a3b292261dd957d97bbdbac3 |
| publicationDate | 1991-10-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | SU-1685878-A1 |
| titleOfInvention | Method for purifying effluents in oxypropylcellulose production |
| abstract | The invention relates to the purification of wastewater from sodium phosphates and polyglycols, can be used in the treatment of wastewater of chemical industry enterprises and allows to increase the degree of wastewater treatment from organic impurities and to ensure the possibility of excretion of recyclable sodium phosphate mineral salts. For carrying out the process, waste water from the production of hydroxypropyl cellulose. containing 25-30 g / l monosodium phosphate, 25-30 g / l disodium phosphate. 28-32 g / l of polyglycols and having a pH of 6.8-7.0, treated with sodium hydroxide to a ratio of disodium phosphate to monosodium phosphate 1: (0.005-0,0005), evaporated to a phosphate concentration of 180-200 g / l. Said waste water is settled and polyglycols are isolated. Purified from polyglycols, one stripped off wastewater is cooled to release phosphates. The degree of wastewater treatment from organic matter is 99.98-99.99%, sodium phosphate is 100%. The composition of the isolated phosphates,%: disodium phosphate 98.34-99.40; monosodium phosphate 1.57-0.49; trisodium phosphate 0.01-0.04: organic impurities 0.07-0.08. The content of phosphonate salts in the selected polyglycol x 0.7-0.9%. Selected polyglycols and sodium phosphates are utilized. 2 tab. (Ls |
| priorityDate | 1988-07-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 35.